hollister



C, P. HOLLISTER. LUBRICAHON 0F INTERNAL comsuslow ENGINES.

APPLICATION FILED AUGJL 1917.

Patent@ me. 2,1919. '2 SHEETS-SHEET 2;

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To ail fio/wm 272: may conce/m.'

Be it known that CLARENCE?. Home TER, e citizen of the United States, residing; at New Yorkq in the county or' New York and State of New York, lieve invented ,eertain new and useful Improvements in Lubrication of internal-Combustion. Engines, of which the following is a speeieation.

My invention relates to the lubrication of internal combustion engines and more particularly to the lubrication oic the rotary valves and the walls of sleeve valves.

In engines of the sleeve-valve type, there is a very large suriace'area between the 1nner cylinder Well and the sleeve valve and between tile latter and tlie compression sleeve or polrin sleeve as well fis-between the piston and t e inner Wall of the sleeve valve and itv is essential to maintain a nlm of lubricating oil between each of these trietional surfaces. Tile main urpose ot my invention is to provide :in e cient system of lubrication' and the construction of sleeve valves and packing sleeves which lwill eti'ee tually maintain a nlm oi oil between. the eontactin surfaces.

'In tie eeeompenying drawings, Figure l. is a vertical sectional view through the cyl nder of en internal eombustion engine showing an embodiment of my invention;D

:Figa 2 is a side elevation, partly broken away, of the sleevevalve; Fig. 3 is atramverse sectional View on the line iik-3 of Fig. 1; Fig. 4f is a side elevation, parti 1 in sec-V tion7 of the compression or packing sleeve; Figs. 5 and 6 are regmentalry detail views; and Fig. 7 is a developed diagram oithe compression sleeve.

The engine cylinder l, which may 'be plo vided with the usual jacket 2, to forni e passage 3 forthe circulation of cooling Weter, is bolted at 4 to the base 5, constituting the crank case of the engine. The revolnble sleeve valve l0 rests upon a bearing ring l2, carried by e. web le extending inwardly from the upper part of the crank ease.

The sleeve valve may be rotated at a speed -proportionate to the speed of the vcrankshaft 17, in any suitable manner, as by ineens of a chain 18, connected to a sprocket Wheel i9 keyed to the crank shaft and a sprocket :20 carrying the Worm 2l, in mesh with the gear teeth on the sleeve valve.

The lubrication of the inner Wall of the sleeve valve be effected in the menne-r 'commonly employed for the lubrication oi"^` Speeieation of Y' portion andA at the base tion. il; portion of the oil in the grooves 2G Petented Dee. 2, Mig.

.pplieation filed ingest tm?. Serial sl.

the eylinder, viz: by tlie oil oontinually dashed up from the supply in the eranlr'ense by the' spiasli of the crank 24 therein. A portion et tlie oil passes through tlie holes to the outer side of the sleeve valve, and into ,the spiral grooves 2G. As 'the sleeve rotates, these spiral channels carry the 'oil upwardly into the annuler groove 26a. l0- ceted substantially the top of the sleeve of the valve poris spread over the surfaces of the cylinder and the sleeve valve to efectually lubricate these snri'faees with an oil lilm.

lie cylinder head 3G proiects Within the eylinder "below the ports and is provided with passages 3l and 32 registering respectively With-the intake port 3e and the outlet port '35. The upper portion of the sleeve yvalve is provided with ports 36, 37 which register alternately with the intake and ex lieust ports.

ln order to prevent leakage during the compression stroke end during the explosion ot' the grises in the explosion cheminer of the cylinder heed, l' provide e packing. sleeve or compression ring 40, which is disposed between the head and the valve sleeve, and provided with ports 3i, 32a registering with passages 3l, 32 in the head. The sleeve or ring; is preteriibly provided with interior' 'threads il oi' reetangnlar section to engage Correspondinfsr threads on the exterior of the head. Packing rings 4:2 prevent the possibility of `any lealage'around tlie top edge of the sleeve. lie compression sleeve is heldin xed position by e screw pin secured in the head and projecting into an aperture 45 in the compression sleeve.

l prefer to malte the compression sleeve an integral ring or eylinderand to ineke it compressilole loy ineens oft a'series of slots el? cut elternately from opposite edges and extending partially across. .lts desirable toshut oil or close the slots extending from the top edge of the-sleeve in order to prevent the escape of any gases during compression which might follow the inside Wall of the sleeve from one of the passages 3l, 32 and then upwardly through these slots and over the top edge of tlie velve to one et the ports. I therefore cut e transverse slot and insert a closure plate e8, which may be Welded M348 to hold it in place.

When the cylinder head witlit-he surrounding compression ring d is inserted within the sleeve valve, it is necessary to slightly compress 'the ring, and it then springs outwardly into close contact with the inner walls of the valve. It is quite important that the engaging surfaces of the ring 40 and valve should be kept well lubricated. For this purpose I provide shallow grooves or rev cesses cut into the outer wall of the compres-4 nect with diiiierent series Ott smaller vertical grooves 56. The oil is drawn into the oill'seti portion 50ZL ofv the main channel 50 2o through au aperture (33, passing through the wall of the sleeve in alinement with the annular groove 26a, which is constantly supplied with oil by the spiral grooves 2G, in the manner previously described.

A notch or channel (32 cut into the side wall of the depending head adjacent the aperture 60 connects the latter' with the bore of the cylinder. An aperture extending through the wall of the sleeve valve and 30 into the annular groove 26a comes into alinenient with the offset portion or branch 50 of the channel .GO'durixi-g every revolution of the valve sothat at this instant there is a direct connection between the groove 26 and the channel 50 in the wall ot the compression sleeve or ring. The aperture 63 is so positioned in the valve wall that it will be in alinement with the oilset groove portion 50a at the instant the piston is starting upon 40 its downward suction stroke. Forclearness of illustration, the aperture (33 is displaced from. its true position in Fig. l.. inasmuch the channel. 50 in the wall ot' the compression ring or sleeve communicates with vthe bore of the cylinder through the aperture 60 and channel 62, it is evident that the downward suction stroke of the piston causes a partial vacuum in the channel and oil'- set portion 50 and as the aperture 63 in the 5()- sleeve valve comes into alinement with the oliset groove portion this will cause a small amount of oil in the groove 26 to 'be drawn inwardly into the portion 50, from whenceiit iiows into channel 50, and in this manner a supply oi oilv will be maintained therein. rlhe rotation. of the sleeve valve around the compression ring i0 will cause the oil to pass from the channel 5() and ofiset portion 50 into the branch channels 5l, 52, 53 and 56 and from these the oil will be distributed over the entire surfaces of the sleeve valve and compression ring. ln addition to supplying oil to the groove or channel 50, the suction through the aperture 63 65 in the annular groove 26a assists in drawing will be understood that a larger= number ,may oc employed if it is found tesirahle.

l have given a detailed description of the particular construction illustrated .in the accompanying drawings for the purpose of clearly disclosing my invention,A but it will be apparent to engineers that various changes and modifi/ations may be made within the scope of my claims and without in any manner departing from my invention.

l. A lubricating system for sleeve valves in internal combustion engines, comprising a rotatable cylindrical sleeve valve provided with a series oi' continuous channels in the outer wall, an oil supply connected therewith, and means for connecting the channels with the upper end of the cylinder chamber `during a portion only of the suction stroke of the piston.

2. A lubricating system forsleeve valves in internal combustion engines, comprising arotatable cylindrical sleeve valve provided with a continuous spiral channel in the outer wall, apertures in the lower portion of the sleeve valve adapted to convey oil from the inner to the outer sides thereof; and means for connecting said channel with the upper end of the cylinder chamber during a portion only of the suction. stroke of the pistou.

3. in an internal combustion engine having a sleeve valve having an upper portion provided with valve openings and a llower cylinder portion, .means'vor lubricating the inner and outer walls of' the sleeve valve', comprising means for delivering oil to the inner portion thereof extending within the engine cylinderbau 4aperture extending through the sleeve to deliver oil from the inner side to the outer side, channels in the outer wall ot the sleeve adapted to carry the oil upwardly, 'a cylindeif head extending within the upper ortion of 'the 'sleeve Valve and provided witii ports in 'alinexnent with the inlet and outlet ports of the engine with which 'the -valve openings register talte'rf nately, a compression ring intermediate said head and the upper valve portion of the sleeve valve, said ring having oil grooves i-n its outerfperiphery, an aperture through said ring and communicating with the cylinder chalmber, and an aperture in the wall of said sleeve valve adapted to aline with a portion of the oil grooves in said ring during the movement of the sleeve valve, Whereby the suction of the piston causes the oil to flow from the channels upon the outside t the sleeve valve into the oil grooves in the compression ring lto thereby lubricate the vcontactinglr surfaces of the ring and valve.

,an inernal Combustion engine hava read depending 'Within the cylinder provided with inlet 'and exhaust paS fs, a sleeve Valve provided With .valve and a compression sleevesor "inermediare said head and valve and. aiding into eonaet with the latter, said i" having openings in alinenient with said faoesg and being," provided, with oil grooves upon its outer periphery and with -an :irpernre extending through its Wall and K4Communieairing 'with theI cylinder chamber, n ierehjf the suction of the piston causes a la partialvaeuuin ineaid grooves).

En an internal combustion engine having a head depending Within the cylinder and provided Wih inlet and exhaust pasairgs adapted lo register alternately with.

passages, and being' provided with oil groovesl upon its outer periphery and with airaperture extending through its Wall and oonnn'unicating with the Aeylinder chamber,

j whereby the suction oil the piston causes a partial Vacuum in said grooves, said sleeve valve having an aperture. adapted'to register wih a portion of the oil grooves in said compression rinv.

. In testimony whereof I affix my signature.

j CLARENCE P, HoLLisTnR. 

